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try:
import uctypes
except ImportError:
print("SKIP")
raise SystemExit
desc = {
# arr is array at offset 0, of UINT8 elements, array size is 2
"arr": (uctypes.ARRAY | 0, uctypes.UINT8 | 2),
# arr2 is array at offset 0, size 2, of structures defined recursively
"arr2": (uctypes.ARRAY | 0, 2, {"b": uctypes.UINT8 | 0}),
"arr3": (uctypes.ARRAY | 2, uctypes.UINT16 | 2),
# aligned
"arr5": (uctypes.ARRAY | 0, uctypes.UINT32 | 1),
# unaligned
"arr6": (uctypes.ARRAY | 1, uctypes.UINT32 | 1),
"arr7": (uctypes.ARRAY | 0, 1, {"l": uctypes.UINT32 | 0}),
"arr8": (uctypes.ARRAY | 1, 1, {"l": uctypes.UINT32 | 0}),
}
data = bytearray(5)
S = uctypes.struct(uctypes.addressof(data), desc, uctypes.LITTLE_ENDIAN)
# assign byte
S.arr[0] = 0x11
print(hex(S.arr[0]))
assert hex(S.arr[0]) == "0x11"
# assign word
S.arr3[0] = 0x2233
print(hex(S.arr3[0]))
assert hex(S.arr3[0]) == "0x2233"
# assign word, with index
S.arr3[1] = 0x4455
print(hex(S.arr3[1]))
assert hex(S.arr3[1]) == "0x4455"
# assign long, aligned
S.arr5[0] = 0x66778899
print(hex(S.arr5[0]))
assert hex(S.arr5[0]) == "0x66778899"
print(S.arr5[0] == S.arr7[0].l)
assert S.arr5[0] == S.arr7[0].l
# assign long, unaligned
S.arr6[0] = 0xAABBCCDD
print(hex(S.arr6[0]))
assert hex(S.arr6[0]) == "0xaabbccdd"
print(S.arr6[0] == S.arr8[0].l)
assert S.arr6[0] == S.arr8[0].l
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